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I need help on the following questions there are 3 files.You may add a file if you prefer.THANKS>

I need help on the following questions there are 3 files.You may add a file if you prefer.THANKS> class=
I need help on the following questions there are 3 files.You may add a file if you prefer.THANKS> class=
I need help on the following questions there are 3 files.You may add a file if you prefer.THANKS> class=

Answer :

The first one is 18.5. That was a result of dividing decimals.
Second one is $4.82 because you are trying to find the unit rate. 
Third is 2608.75 dollars earned. You multiply the number of memberships with cost, 152. Now you add that with the monthly earnings, resulting in that answer. 

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